Report: Trump gives world leaders his private cell phone number

President Donald Trump has raised eyebrows among insiders for allegedly encouraging world leaders to call him on his cell phone -- rather than through official channels.

Although the decision to cut out the middle man might seem like an easy way to save time, he has sparked concern about the security and secrecy of his communications.

SEE MORE: One word President Trump tweeted confused the entire internet

According to the Associated Press, Trump has told Mexico and Canada's leaders to call him directly. Apparently only Canadian Prime Minister Justin Trudeau has taken him up on it so far.

He has also apparently also exchanged numbers with French President Emmanuel Macron

But the president's openness to deal directly with world leaders on a cell phone instead of a secure line has national security experts saying the calls are now vulnerable to eavesdropping.

RELATED - See the body language between the president and first lady abroad:

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Melania Trump's body language during foreign trip raises eyebrows
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Melania Trump's body language during foreign trip raises eyebrows
US President Donald Trump (C) wears the Order of Abdulaziz al-Saud medal, watched by First Lady Melania Trump (L) and a translator (R) after receiving it from Saudi Arabia's King Salman bin Abdulaziz al-Saud at the Saudi Royal Court in Riyadh on May 20, 2017. / AFP PHOTO / MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)
U.S. President Donald Trump and first lady Melania Trump arrive to tour the Church of the Holy Sepulchre in Jerusalem May 22, 2017. REUTERS/Jonathan Ernst
U.S. President Donald Trump and first lady Melania Trump board Air Force One for his first international trip as president, including stops in Saudi Arabia, Israel, the Vatican, Brussels and at the G7 summit in Sicily, from Joint Base Andrews, Maryland, U.S. May 19, 2017. REUTERS/Jonathan Ernst
U.S. President Donald Trump (C) and first lady Melania Trump greet holocaust survivor Margot Herschenbaum after a wreath-laying at the Yad Vashem holocaust memorial in Jerusalem May 23, 2017. Trump was given the gift of a replica of the personal album belonging to young holocaust victim Ester Goldstein, who was Herschenbaum's sister. REUTERS/Jonathan Ernst
U.S. President Donald Trump and first lady Melania Trump wait the arrival of French President Emmanuel Macron (unseen) before a lunch ahead of a NATO Summit in Brussels, Belgium, May 25, 2017. REUTERS/Jonathan Ernst
U.S. President Donald Trump and first lady Melania Trump are welcomed by Saudi Arabia's King Salman bin Abdulaziz Al Saud at Al Murabba Palace in Riyadh, Saudi Arabia May 20, 2017. Picture taken May 20, 2017. Bandar Algaloud/Courtesy of Saudi Royal Court/Handout via REUTERS ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY. FOR EDITORIAL USE ONLY. TPX IMAGES OF THE DAY
U.S. President Donald Trump and first lady Melania Trump board Air Force One to depart for Israel from King Khalid International Airport in Riyadh, Saudi Arabia May 22, 2017. REUTERS/Jonathan Ernst
U.S. President Donald Trump and first lady Melania Trump arrive aboard Air Force One at Ben Gurion International Airport in Lod near Tel Aviv, Israel May 22, 2017. REUTERS/Amir Cohen
U.S. President Donald Trump and first lady Melania Trump hold hands as they arrive to board Air Force One for travel to Rome from Ben Gurion International Airport in Tel Aviv, Israel May 23, 2017. REUTERS/Jonathan Ernst
U.S. President Donald Trump and first lady Melania Trump arrive aboard Air Force One at King Khalid International Airport in Riyadh, Saudi Arabia May 20, 2017. REUTERS/Jonathan Ernst
U.S. President Donald Trump and first lady Melania Trump arrive at the Brussels Airport in Brussels, Belgium, May 24, 2017. REUTERS/Hannah McKay
U.S. President Donald Trump and first lady Melania Trump arrive at the Brussels Airport, in Brussels, Belgium, May 24, 2017. REUTERS/Hannah McKay
Melania Trump (2nd L) and Sara Netanyahu (2nd R) walk onstage with their respective husbands, U.S. President Donald Trump (L) and Israel's Prime Minister Benjamin Netanyahu (R), before a dinner at Netanyahu's residence in Jerusalem May 22, 2017. REUTERS/Jonathan Ernst
U.S. President Donald Trump and first lady Melania Trump arrive to meet Pope Francis at the Vatican, May 24, 2017. REUTERS/Alessandro Bianchi TPX IMAGES OF THE DAY
U.S. President Donald Trump (2nd L) and first lady Melania Trump arrive to leave notes at the Western Wall in Jerusalem May 22, 2017. REUTERS/Jonathan Ernst
US President Donald Trump watches as First Lady Melania Trump signs the guest book at the President's Residence in Jerusalem on May 22, 2017. / AFP PHOTO / THOMAS COEX (Photo credit should read THOMAS COEX/AFP/Getty Images)
US President Donald Trump and First Lady Melania Trump disembark Air Force One upon their arrival at Ben Gurion International Airport in Tel Aviv on May 22, 2017, as part of his first trip overseas. / AFP PHOTO / Jack GUEZ (Photo credit should read JACK GUEZ/AFP/Getty Images)
US President Donald Trump (2-L), First Lady Melania Trump, Israel's President Reuven Rivlin (L) and his wife Nehama arrive at the President's Residence in Jerusalem on May 22, 2017. / AFP PHOTO / Thomas COEX (Photo credit should read THOMAS COEX/AFP/Getty Images)
RIYADH, SAUDI ARABIA - MAY 20: (----EDITORIAL USE ONLY MANDATORY CREDIT - 'BANDAR ALGALOUD / SAUDI ROYAL COUNCIL / HANDOUT' - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS----) Saudi Arabia's King Salman bin Abdulaziz Al Saud (R) welcomes U.S. President Donald Trump (C) and First Lady Melania Trump (L) ahead of a dinner given in honour of him at Murabba Palace in Riyadh, Saudi Arabia on May 20, 2017. (Photo by Bandar Algaloud / Saudi Royal Council / Handout/Anadolu Agency/Getty Images)
US First Lady Melania Trump chats with Saudi Deputy Crown Prince Muhammad bin Nayef bin Abdulaziz al-Saud at a ceremony where US President Donald Trump received the Order of Abdulaziz al-Saud medal from Saudi Arabia's King Salman bin Abdulaziz al-Saud at the Saudi Royal Court in Riyadh on May 20, 2017. / AFP PHOTO / MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)
U.S. President Donald Trump (L) speaks with with King Philippe of Belgium (R) as first lady Melania Trump (C rear) walks Queen Mathilde at the Palace in Brussels, Belgium, May 24, 2017. REUTERS/Francois Lenoir
Pope Francis talks with U.S. President Donald Trump and his wife Melania during a private audience at the Vatican, May 24, 2017. REUTERS/Alessandra Tarantino/pool
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Presidents' phone calls with world leaders often involve considerable advance planning with talking points already mapped out.

Some have compared the move to Hillary Clinton's use of a private email server. During the campaign, then-candidate Trump continuously said that she could not be trusted with classified information.

With the FBI's ongoing probe into Russia and now into his son-in-law and advisor Jared Kushner, private conversations via cell phone may not be the best way to earn their trust.

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